Web cams are one way we communicated in the 21st century. They attached miniature cameras to our computers and we if our friends were on at that time with their cameras, we could talk to them.These cameras were made with lenses, image sensors, and several more support electronics. They were invented in 1987, and first used in Columbia University. They can help connect soldiers to their homes, or moms or dads on business trips.
Used from: http://en.wiki2buy.com/images/1/1b/webcam.jpg. This is a webcam.
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